Product Material: Acrylic + ABSSize: 7.5*7.5*5cmColor: white, red, blackQuantity: 1 piecePackage content: 1 piece * bicycle code table1.Built-in High-Sensitivity GPS ChipThis bike computer has a built-in high-sensitivity GPS chip, and it supports three global positioning systems. You just need to set the time zone before use, the time will be automatically calibrated according to your country's local time.2.Multi-FunctionsSmall size, light weight, IPX5 waterproof, auto sleep function makes it convenient and durable. This bike speedometer is very suitable for measuring speed, altitude, distance, riding time, etc. It is more suitable for cyclists or fitness enthusiasts to record and manage bike riding data during exercise.3.Adjustable BacklightThis progress bike computer is designed with day and night backlight. Simply press the "back" and "right" keys simultaneously to change the backlight level for easy viewing. anti-glare LCD lets you see the data easily in all angles.4.Wireless Design & USB RechargeableUnlike traditional wired bike computer, there are no annoying wires, so this wireless bike speedometer is very easy to install. The USB rechargeable design makes it adaptable to any charger with a USB port. Lithium battery provides up to 8 hours of run time.5.BICYCLE DATA DISPLAYThe device supports kinds of commonly used bike data display: riding time, current/average/max speed, speed comparison, current time, altitude, ODO, riding distance and total time. NOTE: Please make sure your M3 is connected to GPS before cycling.